[RW-9753][risk=no]Cromwell snippet missing from Jupyter R notebook

[NehaBroad]

Snippet to configure and display the status of cromwell app for a user in R Note: We already have a python equivalent of this script

Unfortunately we don't have automated testing configured for the code in this repository yet so we set up this checklist as an automatic reminder:

• [ ] Ensure that the smoke tests pass using the current (or upcoming) CDR
• [ ] Update documentation relevant to this pull request

Questions? See CONTRIBUTING.md or file an issue so that we can get it documented!